Surprise...

Meredith hears commotion outside her bedroom door and sees Alex getting it on with Lexie. Awkwardness ensues for Lexie and Meredith. Alex? He's cool.
Added:

I am MARRIED to cardio!

Erica Hahn meets the men of Seattle Grace, while Izzie and Cristina clamor for her affections in "Kung Fu Fighting." Cool two-minute Grey's Anatomy video clip here.
Added:

Kung Fu Fighting Preview

A clip from "Kung Fu Fighting" in which Erica and Izzie are in the midst of a heart surgery that is about to go horribly badly. Or so it appears. Looks like a good episode.
Added:

Kung Fu Fighting promo

The first preview of "Kung Fu Fighting" from Season Four. It looks like a good episode with a lot going on!
Added:

Grey's Anatomy Season 4 Episode 6 Quotes

[narrating] "There’s this thing about being a surgeon. Maybe it’s pride or maybe it’s just about being tough. But a true surgeon never admits they need help, unless absolutely necessary. Surgeons don’t need to ask for help because they are tougher than that. Surgeons are cowboys, rough around the edges, hard core… at least that’s what they want you to think."

Meredith

“Being aware of your crap and actually overcoming your crap are two very different things.”

Cristina